• Retrospective taxation cases involving Cairn and Vodafone. In both these cases, India has lost arbitration cases internationally, that too in unanimous verdicts. 
• Devas Multimedia, which has won a case against Antrix Corporation (a subsidiary of the Indian Space Research Organisation) for arbitrary cancellation of a contract. As Devas subsequently argued in a US court, nine arbitrators and three international tribunals had deemed the termination of the Devas-Antrix deal as unlawful. The sums involved in each of these cases run to more than a billion dollars. 

Source: Business Standard